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Legacy System Modernization: Effective Strategies and Best Practices

Author(s) Adya Mishra
Country United States
Abstract Legacy system modernization has become a pivotal concern for organizations striving to maintain competitiveness, security, and operational efficiency in today’s fast-moving technological landscape. This review paper explores the multifaceted nature of legacy systems—outdated platforms and applications that, despite reliability, pose escalating challenges in terms of maintenance cost, security vulnerabilities, and rigidity. It discusses the primary drivers for modernization, including stringent regulatory requirements, the need for agility in market responsiveness, and growing pressures to integrate emerging technologies like cloud computing and artificial intelligence. Building on these factors, the paper provides a detailed examination of various modernization approaches, from minimal interventions such as rehosting (“lift-and-shift”) to more ambitious strategies like refactoring, rearchitecting, and rewriting core applications. Best practices emphasize thorough assessment and roadmap development, incremental upgrades, cloud-native architectures, DevOps-driven continuous integration, and parallel migration to mitigate risks and minimize business disruption. Case studies illustrate how phased strategies and robust change management can yield substantial long-term benefits, including reduced technical debt, improved scalability, and greater adaptability to future innovations. Concluding with insights into upcoming trends—such as AI-enabled refactoring and low-code/no-code accelerators—the paper underscores how effective modernization not only safeguards mission-critical operations but also sets the stage for sustained organizational growth and digital transformation.
Keywords IT Modernization, Information Systems, Legacy Systems
Field Engineering
Published In Volume 1, Issue 3, November 2020
Published On 2020-11-10
Cite This Legacy System Modernization: Effective Strategies and Best Practices - Adya Mishra - IJLRP Volume 1, Issue 3, November 2020. DOI 10.5281/zenodo.14769544
DOI https://doi.org/10.5281/zenodo.14769544
Short DOI https://doi.org/g83kts
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